Corner block for a block structure



FIG. 1 is a rear perspective view of the corner block for a block structure.

FIG. 2 is a front perspective view of the corner block.

FIG. 3 is a top plan view of the corner block.

FIG. 4 is a front elevational view of the corner block.

FIG. 5 is a bottom plan view of the corner block; and,

FIG. 6 is a rear elevational view of the corner block. 

CLAIM The ornamental design for a corner block for a block structure, as shown and described. 